摘要
以实现柱浮选段的层流分选环境,促进浮选柱中气泡与矿物的逆流碰撞矿化效果为出发点,通过充填结构的通道形式、孔径、层数及布置方式等主要参数的选择与设计,开发了边界成本最优且能完全充填的正六边形蜂窝管填料对浮选柱的柱浮选段进行充填。CFD流体力学数值模拟结果表明,蜂窝管充填与原先浮选柱中采用的筛板充填相比,更能有效地对柱体中由下而上流体的切向速度和径向速度进行限制。清水条件下的气含率测试。试验结果表明,蜂窝管充填的气含率降低趋势小于筛板充填和无充填的情况。某硫化铜矿工业应用指标表明,蜂窝管充填浮选柱系统获得的精矿品位与筛板充填浮选柱系统精矿品位基本持平,它的铜金属回收率达到92.92%,比筛板充填系统高出1个多百分点,硫化铜矿分选指标得到改善。
In order to realize the laminar flow separation environment of the column flotation and strengthen the countercurrent collision mineralization effects of bubbles with mineral in the flotation column,after selecting and designing of main parameters of filling structure such as channel type,aperture,layer number and arrangement mode,the paper developed regular hexagon honeycomb tube packing medium used as the material of filling the column flotation section,which had the best boundary cost and had completely filling effects.CFD hydrodynamics simulation results showed that compared with sieving plate filling previously used in the flotation column,the honeycomb tube fillings could effectively limit the tangential velocity and radial velocity of the fluid from bottom to up in the flotation column.The gas holdup test results in clean water showed that the decreasing tendency of the gas holdup in honeycomb tube filling was less than that in sieve plate filling and without filling.The industrial application indexes of a copper sulphide ore showed that the honeycomb tube filling flotation column obtained basically equal concentrate grade with sieving plate filling,the copper recovery of honeycomb tube filling reached 92.92%,which was 1% above that of sieve plate filling,the separation index of copper sulphide ore improved.
出处
《矿山机械》
北大核心
2012年第6期80-84,共5页
Mining & Processing Equipment
基金
国家重点基础研究发展计划(973计划)项目(2010CB735501
2012CB214905)
关键词
蜂窝管
筛板
浮选柱
充填
honeycomb tube
sieving plate
flotation column
filling
